Convenient and diverse installation: Double-sided adhesive pasting installation, installation only takes seconds. Accessories include self-tapping screw packages suitable for brick mailboxes, and the metal base can also be suitable for welding installation. Wide range of applications: Horizontal and vertical installation methods have the same information transmission function, suitable for rear mailboxes and wall-mounted mailboxes, and can be easily connected to most mailboxes! Only facing wall-mounted mailboxes for left-side installation Gravity design: The flag is erected by sinking through gravity, and the use process is smoother. The flag is not easy to fall when it is erected. The new design will reduce wear parts during use, thereby effectively extending the life of the product.